In order to research the sensing characteristics of polymer optical waveguide. In this paper, the theoretical
model of transmission of three-layer polymer planar optical waveguide was established based on coupled-mode theory.
The working principle of optical waveguide biosensor was investigated. The article also researched the relationship between
an optical guide’s physical parameters and surface sensitivity and improved on the sensitivity calculation method of
composite optical guide sensing components. This paper then goes on to establish a sensitivity analysis method for disappeared
wave type sensing components. Based on this, the article has developed sensitivity calculation software for high
sensitivity optical guide sensing components and improved film refraction rate of the method for sensitivity calculation.